Enquirer Consulting Group

Reachable Buyer Map

Prepared for Matt Aston · GPRS · United States · August 2026
GPRS sells certainty about what is already in the ground, in the slab and in the walls. This page counts the United States, and it counts the people who commission that work rather than the crews who do it. At most firms in this category, work arrives job by job, through the contractor who called last time and the engineer who wrote it into the spec. This map is the market either side of that: the segments, who signs inside each one, and roughly how many organizations sit there.
Heavy and civil contractors
The segment where hitting something buried is a headline rather than a delay, so damage prevention is already a budget line and the argument is about who does it rather than whether it happens.
Who signs: VP of operations, project executive, safety director, and the superintendent on the job that is already moving.
18,000 to 20,000
US employers registered in heavy and civil engineering construction
Commercial general contractors
The largest countable buyer group and the one with the most repeat volume, because every renovation, fit-out and expansion reopens the same question about what is behind the concrete.
Who signs: preconstruction manager, project executive, director of safety, and the project manager holding the schedule.
22,000 to 24,000
US employers registered in nonresidential building construction and construction management
Engineering and design firms
Upstream of everyone else on this page. The firm that writes the drawing decides whether a scan is specified at all, which makes it the earliest reachable point in the whole market and the least contested one.
Who signs: principal or practice lead, project manager, survey manager, utility coordination lead.
25,000 to 30,000
US employers registered in engineering and architectural services
Utility owners and operators
Owns the network rather than the project. Buys for records and risk over years instead of for a single dig, so the conversation is about a program rather than a day of work.
Who signs: engineering manager, distribution or operations manager, damage prevention lead, GIS or asset records manager.
6,000 to 7,000
US employers registered across electric, gas, water and sewer utilities
Industrial plants at scale
Where the drawings are decades old, the ground has been rebuilt several times and nobody currently on site was there for any of it. Work is bought against shutdowns and capital projects rather than against a construction calendar.
Who signs: plant engineer, facilities director, maintenance manager, capital projects lead.
Roughly 6,000
US manufacturing employers carrying 250 or more people
Campuses and health systems
Long-lived sites under continuous renovation, with a facilities function that owns the record permanently. The slowest to buy on this page and the most durable once they do.
Who signs: director of facilities, campus engineer, capital projects manager, director of plant operations.
Roughly 10,000 combined
about 6,100 US hospitals and about 3,900 degree-granting institutions

Where the openings are

1
Job-by-job demand reaches the projects that already know the name. The segments above come to roughly 87,000 to 97,000 registered US organizations. Wherever a referral and repeat-contractor channel is the main one, it reaches whichever slice already has the number saved. The rest is not unqualified, it is simply unaware, and it is a list rather than a mystery.
2
The specification is upstream of the purchase order. Roughly 25,000 to 30,000 engineering and design employers write the documents that decide whether subsurface work is scoped before anyone breaks ground. Reaching the contractor is reaching the person holding the deadline. Reaching the engineer is reaching the person who created the line item.
3
The data center and telecom build market cannot be counted, which is why it stays open. No public register separates operators that run their own facilities from the hosting and carrier businesses filed under the same codes, so lists sold for this segment mostly return the wrong companies. It is reachable by identification, one at a time, and that difficulty is the reason nobody has worked it properly.
4
A project buys the scan. An owner buys the record. Those are two different buyers with two different budgets and two different time horizons, and they rarely sit in the same conversation. In this category one channel tends to keep returning to the same door. Two named audiences is a different reach problem, and a solvable one.
Built from public federal registry data covering US employers that file a benefit plan, current to the 2024 filing year, alongside published counts of US hospitals and degree-granting institutions. Counts are banded deliberately. Workforce bands use plan participants as a headcount proxy, so they indicate scale rather than an exact staff count. Owner-only and very small employers are not published in this data, and sector codes are self-reported. It describes the market rather than your business, and there is nothing to buy at the end of it.
ENQUIRER CONSULTING GROUP
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